Granular ammonium phosphate sulfate and monoammonium phosphate u

Details Granular ammonium phosphate sulfate and monoammonium phosphate u Granular ammonium phosphate sulfate and monoammonium phosphate u

1975-04-24

1976-05-04

Vertiz, Oscar R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

71 43, C01B 1516, C01B 2526

Patent

active

039549429

ABSTRACT:
A process for the production of fertilizers from phosphoric and sulfuric acids, liquid anhydrous ammonia, and water. The ammonia is premixed with a small quantity of water in a common pipe; the resulting mixture is subsequently mixed downstream of said common pipe with the acids introduced to the pipe through a pipe cross. The acids and aqua ammonia react in the pipe cross and extension of the pipe beyond the cross. Overall length of the pipe reactor is 7 feet and it is cooled by a water jacket. In another variation of the process, the cooling water jacket is not used and the reaction tube is made of either Hastelloy C metal or Teflon-lined mild steel pipe. Slurry from the reactor is granulated with recycle fines, additional phosphoric and sulfuric acids, and ammonia in a rotary drum. Product from the granulator is cooled and screened for product size removal. Equipment is uncomplicated, easy to operate, and inexpensive. Ammonium phosphate sulfate grades such as 6-24-24, 12-12-12, 8-32-16, 8-22-11 and monoammonium phosphate 12-48-0 have been produced with this process.

REFERENCES:
patent: 2729554 (1956-01-01), Nielsson
patent: 2902342 (1959-09-01), Kerley
patent: 3310371 (1967-03-01), Lutz
patent: 3313614 (1967-04-01), Sharples et al.
patent: 3418255 (1968-12-01), Brown et al.

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